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Commit a23a8f5b authored by David Lebrun's avatar David Lebrun Committed by David S. Miller
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lwtunnel: subtract tunnel headroom from mtu on output redirect 



This patch changes the lwtunnel_headroom() function which is called
in ipv4_mtu() and ip6_mtu(), to also return the correct headroom
value when the lwtunnel state is OUTPUT_REDIRECT.

This patch enables e.g. SR-IPv6 encapsulations to work without
manually setting the route mtu.

Acked-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: default avatarDavid Lebrun <david.lebrun@uclouvain.be>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d331d303

include/net/lwtunnel.h

+2 −1
Original line number Diff line number Diff line
@@ -94,7 +94,8 @@ static inline bool lwtunnel_xmit_redirect(struct lwtunnel_state *lwtstate) 
static inline unsigned int lwtunnel_headroom(struct lwtunnel_state *lwtstate,

					     unsigned int mtu)

{

	if (lwtunnel_xmit_redirect(lwtstate) && lwtstate->headroom < mtu)

	if ((lwtunnel_xmit_redirect(lwtstate) ||

	     lwtunnel_output_redirect(lwtstate)) && lwtstate->headroom < mtu)

		return lwtstate->headroom;



	return 0;